Student&#39;s lamp.



No.`698,580. Patnted Apr. 29, |902.

` A. P. STUBRS.

STUDENTS LAMP. (Application med' Jan( 1e, 1900.

(No Model.)

Inviltor A@ f MM Witnesses UNTED STATES- PATENT Ormes.

AARON P. STORRS, OF OWEGO, NEW YORK.

ST-UDENTS LAlVl P.

SPECIFICATION forming part of Letters Patent N O. 698,580, dated April 29., 1902.

Application filed January 16,1900. Serial No. 1,591. (No model.)

To all whom it may concern,.-

Beit known that I, AARON P. SToRRs, a citizen of the United States, residing at Owego, in the county of Tioga and State of NewYork, have invented a certain new and useful Improvement in Students Lamps, oi' which the following is a description.

My invention relates to improvements in students lamps adapted particularly for use in connection with the headlights of locomotives and motor-cars, but obviously capable of other uses.

As is well known, the peculiar flame obtained in students lamps is secured by employing with a central-draft circular burner a chimney having a contracted neck located a proper distance above the Wick, whereby air currents in passing up through the chimney will at the neck flow inward against the fiame and cause the latter to be contracted, while its brilliancy is very materially enhanced. Students lamps, because of the brilliancy of the fiame thus secured, have commended themselves favorably as the source of illumination in headlights. Owing to the rough usage to which such lamps must necessarily be subjected when employed in connection with headlights, the chimneys become very rapidly broken, and the cost of maintenance is large. A mica chimney, owing to its durability, would be Very desirable for use with such lamps; but owing to the character of mica it has been found impossible heretofore to make a chimney with a contracted neck which would be suitable for use with students lamps. I have discovered that so much of a students-lamp chimney as extends below the neck thereof is functionless and that such portion may be dispensed with without in any way affecting the correct operation of the lamp and the securing of the proper flame. As a result of this discovery I have been able to make a mica chimney for a students lamp which will secure the proper results.

Broadly stated, my invention consists in combining with the ordinary burner of a students lamp a mica chimney essentially cylindrical in form, maintained the proper distance above the Wick, and carrying within its lower end a suitable contracting device, by means of which air-currents entering the bottom of the chimney will be causedV to be directed against the flame in the same way and with the same result as such currents are now directed against the iiame by the neck or contracted portion of ordinaryv students -lamp chimneys.

In carrying my invention into effect I pre` fer to properly support a metal ring at a suitable distance above the wick and to carry upon said ring a cylindrical mica chimney having a diameter substantially equal to the external diameter of said ring. The contract` ing-ring may be supported in any suitable .way-as, for example, by means of support-l ing-Wires, which are carried from the Wick# tube of the lamp. For purposes of economy and strength the upper portion of my improved chimney is made of metal having substantially the same bore as the lower portion, and said metal portion of the chimney is preferably passed through and supported by the usual reflector, so that the chimney will be very rigidly maintained in place. In order that the chimney may be prevented from being dislodged by vibrating vertically in use, I prefer to employ elastic fingers, which engage the bore of the chimney and which may conveniently constitute extensions of the supports for the contracting-ring.

In order that the invention may be better understood, attention is directed to the ac companying drawings, forming part of this y specificatiom and in which-` Figure l represents a vertical section of an ordinary students-lamp burner, illustrating my improved chimney in combination therewith and showing the usual refiector for supporting theupper end of the chimney; and Fig. 2, a perspective view of the supporting devices for the chimney, including the contracting-ring.

In both of the above views corresponding parts are represented by the same numerals of reference.

The students-lamp burner l is composed, as is common, of the two concentric sleeves 2 and 3, with the circular Wick l.tbetween them. Suitable means are provided for feeding the wick.

5 represents the usual shoulder, which at the present time carries the ordinary glass chimney of the lamp.

6 6 are a plurality (three in the present IOO case) of supporting-legs, which are made of wire and which at theirlower ends bear Within the shoulder, as shown. These supportinglegs are secured to a split ring 7, which is passed over the outer tube 2 and which tightly engages said tube by its elasticity. The supporting-legs 6 are each bent to form a shoulder 8 at the proper distance above the top of the wick, and immediately above said shoulders a contracting-ring 9 is carried by said supporting-legs, as shown. The contracting-ring 9 is located at about the same distance above the top of the wick as is the contrac'ting-shoulder of the ordinary glass students-lamp chimney.

10 represents my improved mica chimney, which is made in any'suitable Way. I illustrate in the present case a chimney made of a single panel of mica, the edges of said panel being secured together at a rib 1l and being strengthened at the bottom by a strip 12. The upper portion of the chimney 13 is made, preferably, of metal, secured to t-he mica part in any suitable Way. When the usual refiector 14 is employed, the metallic portion 13 of the chimney :nay pass through said reflector, so as to firmly support the device. In order to prevent the chimney from being dislodged by vertical vibrations, the supportinglegs 6 are preferably extended upward above the contracting-ring 9 and are bent outward at 15 to form spring-lingers, which engage the interior of the chimney, so as to prevent accidental vertical movements thereof.

In use the air-currents passing, as indicated by the arrows, beneath the bottom of the chimney and within the contracting-ring 9 impinge against the flame of the wick and cause the flame to be contracted inwardly in exactly the same way as with an ordinary students lamp, whereby the proper brilliant flame will be secured. The device being ordinarily employed within the usual lantern, there can be no danger of the light being eX- tinguished.

Not only am I enabled to secure by the construction described a mica chimney by which a students-lamp flame will be secured, but having a chimney which is located at all times above the wick it does not become necessary to handle the chimney or to touch it in lighting the lamp.

By the expressions students lamp and students-lamp flame as used herein I have reference to any lamp employing a central draft and using a chimney with a contracted portion above the ame and to the variety of flame which is produced in such an apparatus.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows:

1. The combination with a central -draft burner, of a contracting-ringsupported above the wick thereof, and a mica chimney supported above the wick and with its lower end surrounding the contracting-ring, substantially as set forth.

2. The combination with a centraldraft burner, of a series of supporting-legs maintained by said burner, a contracting-ring carried by said supporting-legs above the Wick, and a mica chimney carried by said supporting-legs above the wick wit-h its lower end surrounding said contracting-ring, substantially as set forth.

3. The combination with a centraldraft burner, of a series of supporting-legs carried by said burner, shoulders formed on said legs, a contracting-ring carried by said legs above the wick, and a mica chimney supported by said shoulders above the wick with its lowe-r end surrounding said contracting-ring, substantially as set forth.

4. The combination with a centraldraft burner, of a plurality of supporting-legs carried by said burner, an elastic ring secured to said legs and engaging the outside of the burner,a contracting-rin g carried by said legs and located above the wick, and a mica chimney carried by said legs above the wick with its lower end surrounding said contractingring, substantially as set forth.

5. The combination with a central-draft burner, of a series of supporting-legs carried by said burner, a contracting-ring carried by said legs above the wick, a mica chimney carried by said legs abo ve the wick with its lower end surrounding said contracting-ring, and elastic extensions of said legs engaging the interior of said chimney, substantially as set forth.

T his specification signed and witnessed this 12th day of January, 1900.

AARON P. STORES.

W'itnesses:

C. M. BROOKS, R. T. HoDGE.

ICO

Tim 

